They must be placed in a natural pasture area. Pathing (flooring, gravel, etc.) reduces/eliminates the area where truffles can be produced.

They have a chance of digging up multiple truffles, which is a percent chance equal to Animal Friendship/1500. At max friendship this means they have a 66% chance of creating an additional truffle. Multiple truffles can be made until the animal fails this check, so under optimal conditions a pig will produce an average of three truffles.

Pigs, like all other animals except rabbits, have a low chance to reproduce and can produce baby pigs. The more animals there are inside the same barn, the higher the chance an animal will give birth.

Truffles benefit from professions such as Gatherer, allowing for double harvest, as well as Botanist, making all Truffles iridium quality. However, Truffles do not benefit from the Rancher profession.

Truffles not gathered on the 28th day of a season disappear on the following morning, the 1st day of the new season.